May in Nepa is the rainiest month of the year. In May, the weather in Nepa is typically cold. Average daily high temperature in May is about 9 degrees above zero. On average, Nepa has 16 rainy, 8 cloudy, 4 partly cloudy, and 3 sunny days in May. The rains are usually light. May as well as January, February, March, and April is considered the most uncomfortable time to visit Nepa.